[en] The author analyses the specific positions for Mesozoic large and superlarge volcanic type uranium deposits--geological environment of uranium-bearing volcanic collapse (down faulting) basin, which are characterized by being adjacent to the regional tectonic-magmatic belt, accompanied with sedimentary basin, formed in the early stage of volcanic depression, uplifted in the late stage of basin development, cut by crustal faults, under lain by acidic rock basement and accompanied by extensive argillation. On the basis of discussing the formation mechanism of this type of uranium deposit, nine location criteria for the specific positions are proposed, namely: mobile tectonic-magmatic zone at the intersection of the first and second order tectonic elements; large sized volcano-sedimentary basin at the margin of mobile tectonic-magmatic zone; small sized embayed volcanic collapse (down faulting) basin at the margin of volcano-sedimentary basin; well-developed volcanic rocks in volcanic collapse (down faulting) basin; uplifting of volcanic collapse (down faulting) basin in the later stage of basin development; volcanic collapse (down faulting) basin controlled by a crustal fault with long-term activities; multiple phases of granitic massif developed in the basement of volcanic collapse (down faulting) basin; cover of volcanic collapse (down faulting) basin underwent intense moderate-low temperature volume alteration (mainly as argillation); volume alteration is superimposed by silicification, low temperature albitization, ferrichloritization and anomalies of uranium and associated elements are encountered